/Engine/Source/Runtime/CoreUObject/Public/Serialization/FindReferencersArchive.h
Retrieves the number of references from PotentialReferencer to the object specified.
the number of references to TargetObject which were encountered when PotentialReferencer was serialized.
int32 GetReferenceCount ( class [UObject](API\Runtime\CoreUObject\UObject\UObject) * TargetObject, [TArray](API\Runtime\Core\Containers\TArray)< class [FProperty](API\Runtime\CoreUObject\UObject\FProperty) * > * out_ReferencingProperties ) const